IT Systems Network Administrator

The City of Tolleson is seeking a skilled Information Technology Systems Network Administrator to support and secure the Citys technology infrastructure.

The Systems Network Administrator role emphasizes Cisco networking and enterprise firewall administration, requiring independent configuration, management, and troubleshooting of complex technology environments.

Responsibilities include administeringCisco networks and firewalls, servers, storage, Hyper-V/VMware virtualization, INTRA technologies, and Microsoft cloud platforms, including Microsoft 365, Entra ID, Azure, Intune, and Active Directory.

The position also supports cybersecurity, backup and disaster recovery, system upgrades, monitoring, and advanced Tier 2 and Tier 3 troubleshooting.

Qualifications Associate degree in Computer Science, Information Technology, Network Administration, Cybersecurity, or a related field, and at least five years of progressively responsible experience supporting enterprise networks, firewalls, servers, storage, virtualization, and Microsoft cloud technologies.

An equivalent combination of education, training, and experience may be considered, with directly related experience substituting for required education.

Preferred: CCNA certification or equivalent experience; additional Cisco, Microsoft, cloud, firewall, virtualization, storage, or cybersecurity certifications; experience with multiple enterprise firewall platforms; and local government IT experience.

Knowledge of: - INTRA platforms, technologies, configurations, and integrations.

- Cisco enterprise networking, including routers, switches, wireless systems, Cisco IOS, LAN/WAN/VLAN environments, routing, switching, TCP/IP, DNS, DHCP, and network segmentation.

- Enterprise firewall platforms and security protocols, including ACLs, NAT/PAT, VPNs, intrusion prevention, logging, packet inspection, and traffic analysis.

- Windows and Linux servers, Active Directory, enterprise data storage, backups, recovery, and related applications.

- Hyper-V and VMware virtualization technologies and environments.

- Microsoft cloud technologies, including Entra ID, Microsoft 365, Exchange Online, Intune, and Azure.

- Cybersecurity, system hardening, vulnerability and patch management, incident response, disaster recovery, and business continuity.

- Technical documentation, troubleshooting practices, project management, and current technology industry standards.

Skills in: - Independently configuring, administering, securing, monitoring, and troubleshooting Cisco networks, enterprise firewalls, servers, storage, virtual environments, and Microsoft cloud platforms.

- Analyzing firewall rules, logs, packet captures, traffic flows, and system configurations to identify security risks and resolve complex technical issues.

- Planning and implementing system upgrades, migrations, installations, and configuration changes.

- Evaluating technical and business requirements and recommending secure, reliable, and cost-effective s...